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					 The area which is resistant to any massive structural transformation is called
 
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- rigid mass
 - ancient landmass
 - tectonic plate
 - shield
 
 
Correct Option: D
A shield is generally a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. They are resistant to geological structural transformation. They are normally the nucleus of continents.